Keenly aware of the potential represented by new territories, the company set up a Branch in London under the name “Baume Brothers”. This was the beginning of international expansion. It soon expanded throughout the British Empire, spanning India, Africa, Australia, New Zealand, Singapore and Burma. By the late 19th century, the company had already acquired a solid international reputation and was becoming an inescapable watchmaking player abroad.
Louis-Victor was convinced that watches had appeal for women too, and in 1869 gave his daughter, Mélina, a gold pocket watch. Meanwhile, the company was making chronographs and grandes complications, particularly minute repeaters, calendars and tourbillons. Thanks to its time measuring instruments, the company won ten Grand Prix awards and seven gold medals at international exhibitions and shows in Paris, Melbourne, Zurich, Amsterdam, London and Chicago. As well as being beautiful and highly complex, Baume watches also demonstrated a rare degree of precision. They set accuracy records and won various timekeeping competitions, particularly the precision timing trials held by the Kew Observatory near London. In 1892, Baume won the latter competition with a chronometer pocket-watch equipped with a tourbillon movement of which the precision was to remain unmatched for over ten years.